Gaya APA

UTAMI, P. (2011). E-BOOK CONDITIONAL AND UNREAL PAST & GERUND . JAKARTA: PT BHUANA ILMU POPULER.

Gaya MLA

UTAMI, PUPUT. "E-BOOK CONDITIONAL AND UNREAL PAST & GERUND". JAKARTA: PT BHUANA ILMU POPULER, 2011. Computer File.